EP3917694A1 - Changing the effective contour of a running surface of a working roll during the hot rolling of rolling stock in a roll stand to form a rolled strip - Google Patents
Changing the effective contour of a running surface of a working roll during the hot rolling of rolling stock in a roll stand to form a rolled stripInfo
- Publication number
- EP3917694A1 EP3917694A1 EP20700385.6A EP20700385A EP3917694A1 EP 3917694 A1 EP3917694 A1 EP 3917694A1 EP 20700385 A EP20700385 A EP 20700385A EP 3917694 A1 EP3917694 A1 EP 3917694A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- work roll
- roll
- work
- wear
- rolling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 65
- 238000005098 hot rolling Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000006073 displacement reaction Methods 0.000 claims description 44
- 230000003247 decreasing effect Effects 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
- B21B13/142—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls by axially shifting the rolls, e.g. rolls with tapered ends or with a curved contour for continuously-variable crown CVC
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/021—Rolls for sheets or strips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B2001/225—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length by hot-rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/021—Rolls for sheets or strips
- B21B2027/022—Rolls having tapered ends
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2267/00—Roll parameters
- B21B2267/18—Roll crown; roll profile
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2267/00—Roll parameters
- B21B2267/18—Roll crown; roll profile
- B21B2267/20—Ground camber or profile
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2267/00—Roll parameters
- B21B2267/24—Roll wear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2269/00—Roll bending or shifting
- B21B2269/12—Axial shifting the rolls
- B21B2269/14—Work rolls
Definitions
- the present invention relates to the technical field of rolling mill technology. Specifically, the invention relates to the hot rolling of a rolling stock made of a metallic material, in particular steel or aluminum, to form a rolled strip in a rolling stand.
- the upper and the lower work roll of a roll stand each have a conical section, an inwardly running tread and a cylindrical shoulder.
- the upper work roll is installed in the roll stand in the opposite direction to the lower work roll.
- it is intended to shift the work rolls during rolling in opposite axial directions.
- a strip edge of the rolled strip always lies on the edge between the conical section and the tread. This measure extends the life of the work rolls in a rolling campaign without changing or regrinding the work rolls to 150 km and more. How the effective contour of the tread of a work roll can be changed to a rolled strip during the hot rolling of the rolling stock in a rolling stand is shown in
- the object of the invention is to provide a method and a device for changing the effective contour of a tread of a work roll during the hot rolling of a rolling stock in a roll stand between two work rolls to form a rolled strip.
- the effective contour of a tread of a work roll is to be understood as the contour which the tread of a work roll (which is not axially displaced during hot rolling) should have, so that a certain profile or a certain flatness occurs in the rolled strip when hot rolling a rolling stock.
- the object according to the invention is achieved by a method for reducing an effective contour of a running surface of a work roll during the hot rolling of a rolling stock in a rolling stand to a rolled strip according to claim 1, the rolling stand comprising:
- each work roll having two ends for rotationally mounting the work roll in insert pieces, each work roll has a ke-shaped section in the axial direction and subsequently a running surface,
- the upper work roll is installed in the opposite direction to the lower work roll
- each work roll has a separate Verschiebeein direction for axially moving the work roll, comprising the method steps:
- the contour of the tread is flattened or leveled. In other words, the effective contour becomes flatter.
- the so-called “strip crown”, e.g. Co, C25, C40 can be reduced.
- the roll stand and the work rolls of the roll stand are designed, for example, according to FIG. 1 of WO 2017/215595. In the present invention, however, it is not absolutely necessary that the running surfaces of the work rolls run inwards.
- the rolling stock is hot-rolled in the roll gap between the upper and lower work rolls of the rolling stand, the work rolls being worn out by contact with the rolling stock. Specifically, the radius of the treads increases due to the wear of the work rolls around Ar from.
- the work rolls are each moved in opposite axial directions, for example the upper work roll to the right and the lower work roll to the left. If a respective work roll is moved by a
- Ar indicates the speed of wear of the tread of a work roll in the radial direction.
- the object according to the invention is achieved by a method for increasing an effective contour of a running surface of a work roll during the hot rolling of a rolling stock in a roll stand to a rolled strip according to claim 3, the roll stand comprising:
- each work roll having two ends for rotationally mounting the work roll in insert pieces
- each work roll has a ke-shaped section in the axial direction and subsequently a running surface
- the upper work roll is installed in the opposite direction to the lower work roll
- each work roll has a separate Verschiebeein direction for axially moving the work roll, comprising the method steps:
- the rolling mill can set up or the work rolls of the rolling stand can e.g. 1 WO 2017/215595.
- the tread of the work rolls it is not absolutely necessary for the tread of the work rolls to run inwards.
- a respective work roll is shifted
- the effective contour increases or becomes steeper.
- the object of the invention is also achieved by a device for changing an effective contour of a running surface of a work roll during the hot rolling of a rolling stock in a roll stand to a rolled strip according to claim 7, wherein the roll stand comprises:
- each work roll having two ends for rotationally mounting the work roll in insert pieces
- each work roll has a ke-shaped section in the axial direction and subsequently a running surface
- the running surfaces of the work rolls have a non-cylindrical starting contour before hot rolling
- the upper work roll is arranged in the opposite direction to the lower work roll
- the device according to the invention is suitable both for reducing and for increasing an effective contour of a tread of a work roll during the hot rolling of a rolling stock between the two work rolls in a roll stand. By reducing or increasing the effective contour, the profile and / or the flatness of the strip can be influenced in a targeted manner.
- the device for determining the radial wear or the speed of wear Ar of the running surface of the work rolls determines the wear of the running surface in the radial direction.
- the determination can either be made using measurement technology, or preferably with the aid of a wear model which takes into account, for example, the rolling force F, the distance covered by the work roll s Um fan g and / or the rolling time.
- the device for determining the wear Ar or the speed of wear Ar of the tread is connected to a Dickenmessein device for measuring the thickness of the rolled strip and a device for determining the distance between the upper and lower work rolls. From the, typically vertical, distance between the work rolls and the measured thickness of the strip, the wear or the speed of the wear can be determined.
- the device for determining the wear Ar or the speed of the wear Ar of the tread has a wear model (see EP 2 548 665 B1), the wear model being used to determine at least one of the group of a rolling force measuring device of the rolling force F, the order is s f HS and a clock connected from the work roll to back distance traveled for determining the rolling time.
- the device according to claim 7 also has a measuring device for determining the profile and / or the flatness of the rolled strip, the measuring device being arranged in the direction of mass flow downstream of the roll stand.
- control device for axially moving the work rolls in opposite directions depending on the wear or the speed of wear of the work rolls also takes into account the measured profile PRIst and / or the measured flatness PLIst of the rolled strip.
- control device is connected to the device for determining the wear or the speed of wear and the measuring device for determining the profile and / or the flatness of the rolled strip.
- the displacement device itself can e.g. an electro-mechanical (e.g. a ball screw with an electric motor) or a hydraulic drive.
- an electro-mechanical e.g. a ball screw with an electric motor
- a hydraulic drive e.g. a hydraulic drive.
- the starting contour of a tread is a parabolic contour with a depth of 100 to 300 pm, the central area is thinner than an edge area of the parabolic contour.
- FIG. 1 shows a schematic representation of a roll stand with an upper and a lower work roll for changing an effective contour of a running surface of a work roll during the hot rolling of a rolling stock into a strip
- Figure 2 is a schematic representation of an inventive ⁇ SEN device for changing an effective contour of a tread of a work roll during hot rolling of a rolled material into a strip with the rolling mill of Figure 1,
- 3a ... 3d an illustration of a method according to the invention for reducing the effective contour during the hot rolling of a rolling stock into a strip in a roll stand
- FIG. 5 shows a comparison of the strip profiles from FIG. 3 with FIG. 4,
- Fig. 6 is a schematic representation of a portion of a work roll.
- Figure 1 shows schematically a roll stand 2 as part of a device for changing the effective contour of a running surface 8 of a work roll 3, 4 during the hot rolling of a rolling stock in a roll stand 2 to a rolled strip 1.
- the rolling stock is hot-rolled in the roll gap between the upper work roll 3 and the lower work roll 4.
- Each work roll 3, 4 has two ends 5, each in a chock 6 in a roll stand, not shown, of the roll stand
- each work roll 3, 4 comprises a conical section 7 and a Laufflä surface 8 (see also Fig. 6).
- the upper work roll 3 is installed in the opposite direction to the lower work roll 4 in the roll stand 2.
- the upper and lower work rolls 3, 4 can be moved in the axial direction during operation by means of separate displacement devices 9.
- the upper work roll has a device for determining wear 11 or the device according to the invention has a wear model.
- a single device 11 or a single wear model is sufficient if the work rolls 3, 4 are made of the same material.
- the upper and lower work rolls 3, 4 each have a separate device for determining the wear 11 or a separate wear model. This can be useful if the work rolls 3, 4 during hot rolling with be operated at different speeds.
- the Ar beitswalzen 3, 4 are made of the same material and are operated at the same speed.
- the measurement of the wear Ar or the speed of wear Ar of the tread 8 of the work rolls 3, 4 in the radial direction can be contact-related, for example by a roller which touches the tread 8, or contactless, for example optically. Since the axial displacement of the work rolls in the roll stand to compensate for wear is already known from WO
- 2017/215595 Al is known, details on this are included by reference to this document. However, it is not known from this document how the effective contour can be specifically changed during the rolling of a strip.
- backup rolls have been omitted for reasons of clarity. It is known to any expert in the field of rolling mill technology that backup rolls are common and counteract deflection of the work rolls.
- FIG. 2 schematically shows a device for changing the effective contour of a running surface of a work roll during the hot rolling of a rolling stock in a roll stand 2 of a five-stand finishing mill train, for example in a casting-rolling composite system.
- the rolling stock not shown, is fed via a roller table 17 to the finishing mill with the roll stands 2a to 2e and is finished-rolled there in the warm state.
- the wear Ar or the wear rate Ar of the running surfaces 8 of the work rolls 3, 4 is measured by the measuring device 11 (see FIG. 1).
- the device further comprises a measuring device 12 for determining the profile or the flatness of the rolled strip.
- This measuring device is arranged in the mass flow direction after the roll stand 2.
- the actual profile PRi st is fed to a control device 13.
- the control device 13 is also supplied with the target profile PRs oii .
- the control device 13 calculates, taking into account the wear Ar or the wear speed Ar, and optionally the measured profile PRi st and the desired profile PRs oii ⁇ the displacement path s or the displacement speed s for the upper and lower work roll 3, 4 (see Fig. 1). By moving the work rolls 3, 4 faster or slower, the effective contour of the work rolls can be changed in a targeted manner.
- the rolled strip is cooled in a cooling section 18 and then conveyed out, for example by winding.
- a strip 1 is hot-rolled in the roll gap between the upper work roll 3 and the lower work roll 4.
- the tape has an initial thickness.
- Both work rolls 3, 4 each have two ends 5, a conical section 7 and a tread 8.
- the top work roll 3 is built in the opposite direction to the lower work roll 4.
- the treads 8 of the working rolls 3, 4 are worn out in the radial direction by an amount Ar (see FIG. 3b). If the vertical distance between the two work rolls 3, 4 is kept constant, the rolled strip 1 will be approx. 2Ar thicker. By continuing the hot rolling, the running surfaces 8 of the work rolls 3, 4 are worn down by the amount of 2.Ar (see FIG. 3c), so that the strip becomes approximately 4Ar thicker.
- the work rolls 3, 4 are axially displaced ver that the displacement of the work rolls 3, 4 in
- the wear of a work roll 3, 4 in the radial direction and a indicates the pitch angle of the conical section.
- the displacement can be written down via the speed of the wear Ar, where then a work roll 3, 4 with an axial speed
- this method leads to the distance between the contour of the band 1 between the two edges and the contour of the band 1 at the edges increasing over time.
- the effective contour of the work rolls 3, 4 is steer or the effective contour of the work rolls 3, 4 is increased.
- FIGS. 3b, 3c, 4b and 4c part of the undisclosed tread 8 of the upper work roll 3 is shown in broken lines. The distance between the unworn and the worn tread 8 gives the wear Ar in the radial direction.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Control Of Metal Rolling (AREA)
- Metal Rolling (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19153870.1A EP3685930B1 (en) | 2019-01-28 | 2019-01-28 | Local varying of the roll gap in the area of the edges of a rolled strip |
EP19219974 | 2019-12-30 | ||
PCT/EP2020/050684 WO2020156787A1 (en) | 2019-01-28 | 2020-01-13 | Changing the effective contour of a running surface of a working roll during the hot rolling of rolling stock in a roll stand to form a rolled strip |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3917694A1 true EP3917694A1 (en) | 2021-12-08 |
EP3917694B1 EP3917694B1 (en) | 2023-08-09 |
EP3917694C0 EP3917694C0 (en) | 2023-08-09 |
Family
ID=69156442
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20700385.6A Active EP3917694B1 (en) | 2019-01-28 | 2020-01-13 | Local varying of the roll gap in the area of the edges of a rolled strip |
Country Status (5)
Country | Link |
---|---|
US (2) | US11919059B2 (en) |
EP (1) | EP3917694B1 (en) |
CN (1) | CN113316491B (en) |
ES (1) | ES2954881T3 (en) |
WO (1) | WO2020156787A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114260315A (en) * | 2021-12-24 | 2022-04-01 | 重庆钢铁股份有限公司 | Application method of rough and medium rolling hole-free roller on rod and wire hot rolling line |
CN115591948B (en) * | 2022-10-13 | 2024-05-14 | 福建鼎盛钢铁有限公司 | Method for improving control precision of section size of ESP strip steel |
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SU1049130A1 (en) | 1982-07-26 | 1983-10-23 | Донецкий Ордена Трудового Красного Знамени Политехнический Институт | Method of temper rolling of strips |
DE3585164D1 (en) | 1984-02-29 | 1992-02-27 | Kawasaki Steel Co | HOT ROLLING PROCESS. |
JPS60244408A (en) | 1984-05-18 | 1985-12-04 | Ishikawajima Harima Heavy Ind Co Ltd | Rolling mill |
JPS61144202A (en) | 1984-12-19 | 1986-07-01 | Kawasaki Steel Corp | Rolling method for controlling shape of sheet stock |
JPS61154709A (en) | 1984-12-26 | 1986-07-14 | Kawasaki Steel Corp | Device for controlling thickness profile of sheet stock |
JPS62259608A (en) | 1986-05-07 | 1987-11-12 | Nippon Kokan Kk <Nkk> | Method for controlling flatness at sheet end in cold rolling of thin sheet |
GB2202174B (en) | 1987-01-09 | 1991-07-03 | Nippon Steel Corp | Method for rolling metal sheets |
JP2616917B2 (en) | 1987-01-24 | 1997-06-04 | 株式会社日立製作所 | Rolling method by roll shift rolling mill |
JPH01284404A (en) | 1988-05-09 | 1989-11-15 | Nippon Steel Corp | Method for rolling steel stock by taper roll shift |
JPH01321007A (en) | 1988-06-24 | 1989-12-27 | Kawasaki Steel Corp | Rolling method including edge drop control means for sheet stock |
GB8822669D0 (en) | 1988-09-27 | 1988-11-02 | Davy Mckee Sheffield | Rolling of metal workpieces |
US5174144A (en) * | 1990-04-13 | 1992-12-29 | Hitachi, Ltd. | 4-high rolling mill |
JPH06277727A (en) | 1993-03-25 | 1994-10-04 | Kobe Steel Ltd | Method for controlling plate crown |
US5448901A (en) * | 1994-05-03 | 1995-09-12 | The University Of Toledo | Method for controlling axial shifting of rolls |
GB9411820D0 (en) | 1994-06-13 | 1994-08-03 | Davy Mckee Poole | Strip profile control |
CN1169342A (en) | 1996-06-21 | 1998-01-07 | 朱宝理 | Four-roller system with large-offset slab to control working-roller |
DE19654068A1 (en) | 1996-12-23 | 1998-06-25 | Schloemann Siemag Ag | Method and device for rolling a rolled strip |
DE19719318C2 (en) | 1997-05-08 | 2003-06-12 | Sms Demag Ag | Process for influencing the belt contour in the edge area of a roller belt |
RU2129927C1 (en) | 1998-06-15 | 1999-05-10 | Череповецкий государственный университет | Roll assembly of rolling stand of strip rolling mill |
IT1315117B1 (en) | 2000-09-25 | 2003-02-03 | Danieli Off Mecc | METHOD FOR CONTROLING THE AXIAL FORCES THAT ARE GENERATED BETWEEN ROLLING CYLINDERS. |
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WO2006029770A1 (en) | 2004-09-14 | 2006-03-23 | Sms Demag Ag | Convex roll used for influencing the profile and flatness of a milled strip |
CH697624B1 (en) * | 2005-02-23 | 2008-12-31 | Main Man Inspiration Ag | Rolling device for an in-line rolling of a produced by strip casting, in particular twin-roll strip casting steel strip. |
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DE102006051728B4 (en) | 2006-10-30 | 2013-11-21 | Outokumpu Nirosta Gmbh | Method for rolling metal strips, in particular steel strips |
CN101254508B (en) * | 2008-01-30 | 2011-08-17 | 武汉钢铁(集团)公司 | Work roll with steel rim drop-control and flat degree control |
CN101992215B (en) | 2009-08-13 | 2012-07-04 | 宝山钢铁股份有限公司 | Axial movement control method for continuously variable crown (CVC) working roll |
AT509107B1 (en) | 2009-12-10 | 2011-09-15 | Siemens Vai Metals Tech Gmbh | ROLLING MILL FOR THE PRODUCTION OF ROLLING BAND |
PL2548665T3 (en) | 2011-07-22 | 2014-07-31 | Siemens Ag | Method for determining the wear on a roller dependent on relative movement |
KR102122217B1 (en) | 2015-03-16 | 2020-06-12 | 에스엠에스 그룹 게엠베하 | Method for manufacturing a metal strip |
RU2615670C1 (en) | 2015-10-05 | 2017-04-06 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Липецкий государственный технический университет" (ЛГТУ) | Hot strip rolling method |
CN205659983U (en) | 2016-06-15 | 2016-10-26 | 日照宝华新材料有限公司 | ESP production line is with long kilometer number rolling rollers |
CN111050935B (en) * | 2017-10-31 | 2021-06-22 | 东芝三菱电机产业***株式会社 | Roll grinding loss dispersion method of rolling mill frame and rolling system |
CN108405628B (en) | 2018-03-13 | 2020-04-07 | 武汉钢铁有限公司 | Optimal section profile control method for hot-rolled non-oriented silicon steel |
-
2020
- 2020-01-13 CN CN202080011252.8A patent/CN113316491B/en active Active
- 2020-01-13 US US17/310,246 patent/US11919059B2/en active Active
- 2020-01-13 EP EP20700385.6A patent/EP3917694B1/en active Active
- 2020-01-13 WO PCT/EP2020/050684 patent/WO2020156787A1/en unknown
- 2020-01-13 ES ES20700385T patent/ES2954881T3/en active Active
-
2024
- 2024-01-22 US US18/419,008 patent/US20240173759A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
CN113316491A (en) | 2021-08-27 |
US11919059B2 (en) | 2024-03-05 |
US20240173759A1 (en) | 2024-05-30 |
EP3917694B1 (en) | 2023-08-09 |
US20220126337A1 (en) | 2022-04-28 |
ES2954881T3 (en) | 2023-11-27 |
WO2020156787A1 (en) | 2020-08-06 |
EP3917694C0 (en) | 2023-08-09 |
CN113316491B (en) | 2023-08-11 |
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